A particle in one-dimensional motion:

1. with zero speed at an instant may have non-zero acceleration at that instant.
2. with zero speed may have non-zero velocity.
3. with constant speed, must have non-zero acceleration.
4. with a positive value of acceleration must be speeding up.

Subtopic:  Acceleration |
 53%
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The figure gives a speed-time graph of a particle in motion along the same direction. Three equal intervals of time are shown. In which interval is the average acceleration greatest in magnitude?

  

1. Interval 2

2. Interval 1

3. Interval 3

4. Equal in all intervals
Subtopic:  Acceleration |
From NCERT
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